<!DOCTYPE html>
<html lang="en">
    <head>
        <meta charset="UTF-8">
        <title>Title</title>
        <style>
            *{
                margin: 0;
                padding: 0;
            }
           .a{
               width: 404px;
               height: 404px;
               border: 1px dashed black;
               margin: 50px auto 0;
           }
            .b{
                width: 340px;
                height: 340px;
                border: 5px solid #d7eefe;
                margin: 27px;
            }
            .c{
                width: 300px;
                height: 300px;
                background-color: #ffa1e0;
                margin: 20px;
                overflow: hidden;
            }
            .d{
                width: 216px;
                height: 216px;
                border: 1px dotted white;
                margin:41px;
            }
            .e{
                width: 208px;
                height: 208px;
                border: 1px dashed white;
                margin: 3px;
            }
            .f{
                width: 100px;
                height: 100px;
                background-color: #97ff38;
                border: 5px solid #fdff00;
                margin: 49px;
            }
        </style>
    </head>
    <body>
        <div class="a">
            <div class="b">
                <div class="c">
                    <div class="d">
                        <div class="e">
                            <div class="f">

                            </div>
                        </div>
                    </div>
                </div>
            </div>
        </div>
        </body>
</html>